From: Eric Paris <eparis@redhat.com>
Date: Tue, 4 Dec 2007 16:06:55 +0000 (-0500)
Subject: VM/Security: add security hook to do_brk
X-Git-Tag: v2.6.24-rc5~63^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5a211a5deabcafdc764817d5b4510c767d317ddc;p=pandora-kernel.git

VM/Security: add security hook to do_brk

Given a specifically crafted binary do_brk() can be used to get low
pages available in userspace virtually memory and can thus be used to
circumvent the mmap_min_addr low memory protection.  Add security checks
in do_brk().

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
---

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